03-13-2020, 07:41 AM
Went directly to the range after work yesterday to do the test for two loads on target, powder VV N530.
Range 97m (~106yrds)
Temp: +2C
Pressure: 973hPa
Humidity: 64%
Altitude over sea level: 300m (~984ft)
Two loads with 10 shots each.
Shot at target in 2 separate 5-shot groups. Shooting done prone with bipod and rear bag. Started with 3 shots for CBS and sighting.
For each load with 10 shots the speed was checked with a Magnetospeed.
Result from the chrono:
28.4gr of N530
Avg: 852 m/s (~2795 fps)
SD: 2 m/s (~6.5 fps)
ES: 7 m/s (~23 fps)
29.0gr of N530
Avg: 870 m/s (~2854 fps)
SD: 3 m/s (~9.8 fps)
ES: 9 m/s (29.5 fps)
Result on targets:
28.4gr group 1.
[ATTACH=CONFIG]15700[/ATTACH]
28.4gr group 2.
[ATTACH=CONFIG]15701[/ATTACH]
29.0gr group 1.
[ATTACH=CONFIG]15702[/ATTACH]
29.0gr group 2.
[ATTACH=CONFIG]15703[/ATTACH]
The absolute first shot on target No.1 with 28.4gr was the high left. After that all stacked well. Target No.2 with 28.4gr was shot directly after and the shift in POI is little confusing. Something happened.
The first shot on the target No.1 with 29.0gr was the flyer on the right but after that the group was good. The target No.2 with 29.0gr is nothing else than pure frustration....Fist two shots landed one to the left and one to the right. The mirage started to build up and I just slammed of the last 3 shots. Yes I know. I am immature.
The speed is nice and the data is OK.
I like the loads and the cases looked absolutely fine. No signs of high pressure. But still, the groups should have been better and the POI should not have shifted that much. The cases have however been fired many times >10 firings each. And I have noticed some signs of ware on them. Also is it very noticeable that the neck tension is shifting when the bullet is seated.
If the cases is a reason for the groups, I do not know.
What I do know is that I loaded up the exact same loads yesterday. 10 shots each and will on the next test redo the test on target.
Difference will be me for the most part. I will force myself to take it slow and really try to focus on the shooting.
Range 97m (~106yrds)
Temp: +2C
Pressure: 973hPa
Humidity: 64%
Altitude over sea level: 300m (~984ft)
Two loads with 10 shots each.
Shot at target in 2 separate 5-shot groups. Shooting done prone with bipod and rear bag. Started with 3 shots for CBS and sighting.
For each load with 10 shots the speed was checked with a Magnetospeed.
Result from the chrono:
28.4gr of N530
Avg: 852 m/s (~2795 fps)
SD: 2 m/s (~6.5 fps)
ES: 7 m/s (~23 fps)
29.0gr of N530
Avg: 870 m/s (~2854 fps)
SD: 3 m/s (~9.8 fps)
ES: 9 m/s (29.5 fps)
Result on targets:
28.4gr group 1.
[ATTACH=CONFIG]15700[/ATTACH]
28.4gr group 2.
[ATTACH=CONFIG]15701[/ATTACH]
29.0gr group 1.
[ATTACH=CONFIG]15702[/ATTACH]
29.0gr group 2.
[ATTACH=CONFIG]15703[/ATTACH]
The absolute first shot on target No.1 with 28.4gr was the high left. After that all stacked well. Target No.2 with 28.4gr was shot directly after and the shift in POI is little confusing. Something happened.
The first shot on the target No.1 with 29.0gr was the flyer on the right but after that the group was good. The target No.2 with 29.0gr is nothing else than pure frustration....Fist two shots landed one to the left and one to the right. The mirage started to build up and I just slammed of the last 3 shots. Yes I know. I am immature.
The speed is nice and the data is OK.
I like the loads and the cases looked absolutely fine. No signs of high pressure. But still, the groups should have been better and the POI should not have shifted that much. The cases have however been fired many times >10 firings each. And I have noticed some signs of ware on them. Also is it very noticeable that the neck tension is shifting when the bullet is seated.
If the cases is a reason for the groups, I do not know.
What I do know is that I loaded up the exact same loads yesterday. 10 shots each and will on the next test redo the test on target.
Difference will be me for the most part. I will force myself to take it slow and really try to focus on the shooting.